When there is a green light,cars may go on.When there is a red light,cars must (s ).They must wait(u ) the red light changestogreen

问题描述:

When there is a green light,cars may go on.When there is a red light,cars must (s ).They must wait
(u ) the red light changestogreen

stop 停下
until 直到
句子的意思是只有等到红灯变绿了才能走
希望可以帮到你~

(s ). stop 停
(u ) until 直到

stop;until

stop until

stop,until